How to Choose a Peristaltic Pump

The basic principle of the peristaltic pump traces back to human “peristalsis” [a term referring to the alternating contraction and relaxation of muscles around a tube to force the contents through it]. An elastomeric tube is squeezed along its length by rollers or shoes that pushes the fluid contained within. The tube’s restitution after squeezing produces a vacuum that draws fluid continuously into the tube. This creates a gentle pumping action that doesn’t cause any damage to the product. Contamination is avoided because the product is contained in the tube [the only pump part that comes in contact with the pumped fluid].

The peristaltic pump is a very versatile pump. It is a self-priming, positive displacement pump, able to deliver relatively high pressure, pass solids and transport corrosive and abrasive media. But selecting the right one for the job is important.

There are basically two types of peristaltic pump. Low pressure, low flow pumps that are commonly used in laboratories or for low flow dosing or metering applications and there are industrial class pumps. The industrial units are bigger, handling higher flows and able to generate higher pressures. It is these industrial pumps we will be concentrating on.

The peristaltic pump is easy to install and can be inexpensive to maintain if selected correctly.

Selection Consideration

There are a number of parameters that need to be considered when selection the right peristaltic pump for a particular application. These are: duty cycle; flow; pressure; suction conditions; the correct hose [tube] for the pumped media; temperature limitations; cleaning requirements [CIP or SIP]; the effect of possible contamination; and maintenance aspects.

Ragazzini peristaltic pump

Duty Cycle

It is important to consider the duty cycle when selecting a pump. If the pump is asked to operate on a continuous basis [hours on end], the speed must be reduced to prevent a shortened hose life. Good manufacturers will have performance curves that detail what part of the pump curve can be treated as continuous duty and what part should only be used as intermittent.

How to choose a peristaltic pump

Flow

Most performance curves are based on water-like substances and flooded suction. When dealing with more viscous fluids or high suction lifts, this will need to be factored into sizing the pump for the correct flow inclusive of de-rating speeds for these aspects. Good manufacturers will have de-rating charts for increased viscosity.

How to choose a peristaltic pump

Pressure

Not all peristaltic pumps were created equal. The better designs will enable pumps to be applied on applications with pressures to 15 bar. This is achieved through hoses rated to these pressures and rollers, rotors and other components designed for these high pressures. Manufacturers will detail what models are rated to these pressures and what the flow and speed limitations are.

Suction Conditions

Peristaltic pumps are capable of high suction lifts, but any peristaltic pump selected for a duty requiring a suction lift should have a pulsation dampener fitted. Also, if the viscosity exceeds 2000cPs, the suction line diameter should be increased. Another good “rule of thumb” is to keep the suction line as short as possible.

Roller on bearings design

Correct Hose

Selecting the right hose material for an application is critical in achieving extended hose life, and also critical if hygiene is required for transporting food or pharmaceutical products. Some typical hose materials are as follows:-

– Natural Isoprene for abrasive fluids or moderately aggressive fluids. This is the most common hose material and is often available with various pressure ratings.

– Natural Isoprene with Substrate for Food Products. These hoses will have FDA approval numbers and be suitable for the transportation of food grade products. Should be able to sterilize with hot water and a diluted cleaning agent and also steam cleaning.

– This hose material is suitable for a wide range of chemicals.

– This hose is suitable for oils, greases, hydrocarbons and various solvents.

– NBR for Food Products. These hoses will also have FDA approval numbers and are suitable for oils and fats. Should be able to sterilize with hot water and a diluted cleaning agent and also steam cleaning.

– This hose is suitable for a range of concentrated acids and alkaline liquids.

– PHARMED Thermoplastc Elastomer Base Polypropylene. A limited use hose for liquid pharmaceutical products. Will have FDA approval numbers and should be capable of sterilization with hot water.

Ragazzini leak detection system

Temperature Limitations

Good manufacturers will have temperature limitations in their hose selection guides. Ensure operating temperatures do not exceed the temperature rating of the hose.

Ragazzini Peristaltic Pump

Cleaning Requirements

Where hoses need to be cleaned in place [CIP] or sterilized in place [SIP], the hose selection needs to allow for this. Also, it will be of great assistance to operators if pump rollers.

Ragazzini gentle pumping action

Contamination

If product contamination is an issue, selecting a peristaltic pump with rollers instead of shoes is best. The pumps with shoes will need their casings to be full of lubricating fluid. When the hose starts to fail, the lubricating fluid may contaminate the product being pumped.

ragazzini peristaltic hose pumps MS range

Maintenance

A peristaltic pump does not require a lot of maintenance apart from hose changes. It is in this area that pumps with certain designs and certain features can save time and money. A pump with rollers does not have a casing full of lubricant, so does not need this oil drained and then re-filled again after the hose change, and no clean-up of the mess.

Early leak detection is another feature that reduces maintenance costs. This is only possible for pumps with the roller on bearing design. Because casings are not filled with fluid, a simple “plunger-in-cup” designed leak detector can pick up hose failures early, minimizing product loss and mess.

A remotely operated retractable roller will also reduce maintenance costs by extending hose life. Between pumping cycles [over night, weekends, holiday periods], the roller can be retracted to remove pressure on the hose during these periods, greatly extending hose life.

ragazzini valveless peristaltic hose pump

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Pump Features Videos:

Watch instructional videos here showing how simple the maintenance activities are for Ragazzini Peristaltic pumps:

INTRODUCING RAGAZZINI PERISTALTIC PUMP

1. PUMP FEATURES

2. PUMP PERFORMANCE

3. RECOMMENDED ACCESSORIES

4. PUMP APPLICATIONS

5. SHOES VS. ROLLERS DESIGN

6. EASY HOSE REPLACEMENT

7. RETRACTABLE ROLLER SYSTEM

RAGAZZINI ROTHO PERISTALTIC PUMP

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Peristaltic Pumps:

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The Gorman-Rupp Super T Series self-priming centrifugal wastewater/sewage pump has been the world benchmark for this technology since 1963 (>50 years). They have been designed for economical, trouble-free operation, with superior solids handling capability and a large inspection cover to access pump internals for service or blockage removal.

Advantages include:

  • Self-Priming pump has the ability to mount high and dry above the wet well (not in it)
  • Low cost of ownership
  • Greatly reduced OH&S issues – no more working over water/heights/cranes/heavy swinging weights
  • Surface-mounted pumps with easy access for monitoring or service
  • Advanced safety features including pressure relief valve to protect operators
  • Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
  • A variety of materials of construction to handle abrasive and/or corrosive fluids

The Gorman-Rupp Super T Series sewage and wastewater pumps with Eradicator™ Solids Management System are a series of self-priming centrifugal pumps designed specifically for handling municipal and industrial wastewater containing stringy, difficult to pump, solids in suspension (such as wet wipes, rags and feathers).

They have been designed for economical, trouble-free operation, with design features that deliver superior solids handling capability and a large inspection cover to access pump internals for service or blockage removal. Gorman-Rupp Super T Series wastewater and sewage pumps have been used for pumping of WAS and RAS and for digester recirculation with great success in wastewater treatment plants around the country, as well as food process plants, paper mills and other heavy industries. The Eradicator™ system advances the solids handling capabilities of this range.

Advantages include:

  • Ability to mount high and dry above the wet well [not in it]
  • Low cost of ownership
  • Greatly reduced OH&S issues
  • Easy access for monitoring or service
  • Advanced safety features to protect operators
  • Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
  • A variety of materials of construction to handle abrasive and/or corrosive fluids

Download the Brochure | Ask Our Team

The Gorman-Rupp Ultra V Series is the most advanced self-priming centrifugal wastewater and sewage pump range on the market today.

They are high performance, high head, and high-efficiency pumps, designed to deliver a long and low maintenance service life, with a low cost of ownership.

Advantages include:

  • Ability to mount high and dry above the wet well [not in it]
  • Efficiencies up to 20% higher than any other solids handling self primer
  • Higher pressures (heads) (up to 300%) than any other solids handling self primer
  • Greatly improved operator safety
  • Easy access for monitoring or service
  • Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
  • A variety of materials of construction to handle abrasive and/or corrosive fluids

The Gorman-Rupp Ultra V Series solids handling sewage and wastewater pumps with Eradicator™ Solids Management System are a series of self-priming centrifugal pumps designed specifically for handling municipal and industrial wastewater containing stringy, difficult to pump, solids in suspension (such as “wet wipes” , rags and feathers).

They have been designed for economical, trouble-free operation, with design features that deliver superior solids handling capability and a large inspection cover to access pump internals for service or blockage removal. Gorman-Rupp Ultra V Series wastewater and sewage pumps have been used for pumping of WAS and RAS and for digester recirculation with great success in wastewater treatment plants around the country, as well as food process plants, paper mills and other heavy industries. The Eradicator™ system advances the solids handling capabilities of this range.

Advantages include:

  • Ability to mount high and dry above the wet well [not in it]
  • Low cost of ownership
  • Greatly reduced OH&S issues
  • Easy access for monitoring or service
  • Advanced safety features to protect operators
  • Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
  • A variety of materials of construction to handle abrasive and/or corrosive fluids

Download the Brochure | Ask Our Team

Ragazzini Peristaltic Pump are at the cutting edge of  “Hose Pump” design and have the features to make pumping easier. They consist of an elastomeric tube that is squeezed along its length by rollers that push the fluid contained within. This creates a gentle pumping action that doesn’t cause damage to the product. Further advantages include:

  • Handle a range of applications  including food products, abrasives, chemicals and solids
  • High performance including pressures to 15 BAR, reversible flow, and suction lifts
  • Easy maintenance including easy hose replacement and easy leak detection
  • CIP with retractable rollers
  • Greater operator safety
  • Easy access for monitoring or service
  • A variety of hose materials  to handle food, pharmaceuticals, abrasive and/or corrosive fluids

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Ragazzini Rotho Peristaltic Pumps are the ideal choice for dosing and metering.

They consist of an elastomeric tube that is squeezed along its length by rollers that push the fluid contained within. This creates a gentle pumping action that doesn’t cause damage to the peristaltic pump.

Advantages include:

  • Handle a range of fluids including viscous products, abrasives and chemicals
  • High performance including pressures to 15 BAR, reversible flow, and suction lifts
  • Accurate metering as well as high flows (to 180m3/hour)
  • Easy maintenance including easy hose replacement and easy leak detection
  • CIP with retractable rollers
  • Greater operator safety
  • Easy access for monitoring or service
  • A variety of hose materials to handle food, pharmaceuticals, chemical, abrasive and/or corrosive fluids

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The Gorman-Rupp Super U Series self priming dewatering and grey water pumps combines the best features of quality trash pumps in Australia with increased fuel efficiency and higher heads to pump through smaller and/or longer discharge piping systems or overcome the losses in filter systems.

These centrifugal pumps have been designed for economical, heavy duty (24/7) trouble-free operation.

Advantages include:

  • Ability to mount high and dry above the water (not in it)(to 7.6m)
  • Low cost of ownership
  • Greatly reduced OH&S issues
  • Easy access for monitoring or service
  • Advanced safety features to protect operators
  • Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
  • A variety of materials of construction to handle abrasive and/or corrosive fluids
  • Any engine brand required by the customer
  • Choice of skid or trailer mounted configuration

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The Gorman-Rupp G Series range of self priming positive displacement rotary gear pumps is designed to provide superior performance in the transfer of process fluids, unmatched in the industry. Available in Medium-Duty , Heavy-Duty and Extreme-Duty (abrasive service) models, gear pump materials include cast iron, cast steel and stainless steel.

G Series self priming pumps are manufactured with unique features that enable them to perform better and last longer on countless applications, providing quality and reliability that make the G Series the premier gear pump in the industry.

Advantages include:

  • An automatic idler pin lubrication system uses the pumped fluid to continuously cool and lubricate the idler pin and bush to reduce wear in this area.
  • An internal seal cavity venting system provides a continuous flow of liquid through the seal area, ensuring cooling and reducing pressure. This reduces seal face
  • load, increasing seal life.
  • A deep “end-feed” area offers superior priming performance under low inlet pressure conditions and/or high viscosity liquids.
  • Easy to service
  • Viscosities to 440,000 cSt
  • Pressures to 20.7 bar (300 psi)
  • Flows to 2200 litres per minute
  • Handle a variety of liquids , including highly viscous, high temperature and abrasive fluids
  • Widest range of sealing options in the industry
  • High strength gear material eliminates the need for special steel fittings traditionally needed for viscous applications.
  • Widest range of housing ports
  • Widest range of bushing materials

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The EDUR PBU multiphase pump is a single-stage peripheral centrifugal pump with the unique capability of being able to pump a liquid/gas mixture. The centrifugal pump is constructed of stainless steel, so may be used to handle a variety of liquids. Air, Oxygen, Carbon Dioxide and Ozone gases can be introduced into the suction line and transported and used to mix or disperse the gases. This makes the pump ideal for DAF plants, where the multiphase pumps provide the task of air saturation without the use of compressed air (no compressor, air saturation tank or associated controls).

Advantages include:

  • Liquid flows to 1 l/s
  • Gas content up to 15%
  • Stainless steel construction
  • Completely replace the “old” DAF system with a single pump

Ask Our Team

The EDUR LBU multiphase pump is a multi-stage centrifugal pump with the unique capability of being able to pump a liquid/gas mixture. The centrifugal pump is constructed of either C.I./ Bz/ SS, Nodular Cast Iron, All-Bronze, Stainless Steel, or Super-Duplex Stainless Steel construction, so may be used to handle a variety of liquids.

Air, Oxygen, Carbon Dioxide and Ozone gases can be introduced into the suction line and transported and used to mix or disperse the gases. This makes the pump ideal for DAF plants, where the multiphase pumps provide the task of air saturation without the use of compressed air (no compressor, air saturation tank or associated controls).

Advantages include:

  • Liquid flows to 16 l/s
  • Gas content up to 20%
  • Cast iron/Bronze/Stainless steel, Nodular cast Iron, All-Bronze, Stainless Steel, or Super-Duplex Stainless Steel construction
  • Completely replace the “old” DAF system with a single pump

Download the Brochure | Ask Our Team

Trailer mounted multi-purpose machines designed to speed up and simplify the deployment of emergency response equipment for municipalities, emergency services and contractors.

Advantages include:

  • Enables deployment of multiple pieces of equipment, using only one vehicle.
  • Diesel-driven power generator complete with variable frequency drive [VFD] powers a lighting tower and a rugged and reliable Gorman-Rupp pump.
  • The cleverly designed unit can light up a work area while operators set up the self-priming pump or operate numerous electric tools from the power generator.
  • The VFD allows for soft starting electrical equipment, including the pump, and can vary the speeds of these machines to suit the duty at hand. While all this is happening, the compressor can be driving air nibblers, air-operated nail guns, wrenches or tyre inflators.
  • The Lampo units also come standard with an air compressor, discharge hose reel, suction hoses and a robust mounted toolbox.

The central components of the Lampo – the generator, VFD and lighting system are manufactured by quality equipment manufacturer, Euromacchine in Italy. They are housed in an acoustically rated enclosure constructed from powder-coated galvanised steel plates.

The Lampo multipurpose units are then mounted on an Australian heavy-duty built hot-dip galvanised double axle trailer and fitted with a self-priming Gorman-Rupp trash pump.

The Gorman-Rupp Super T Series self priming dewatering pump has been the world benchmark for this technology since 1963 (>50 years). These centrifugal pumps have been designed for economical, trouble-free operation, with superior solids handling capability and a large inspection cover to access pump internals for service or blockage removal. Advantages include:

Advantages include:

  • Ability to mount high and dry above the water (not in it)(to 7.6m)
  • LLow cost of ownership
  • Greatly reduced OH&S issues
  • Easy access for monitoring or service
  • Advanced safety features to protect operators
  • Improved maintenance features to greatly reduce maintenance time and costs, with removable rotating assembly
  • A variety of materials of construction to handle abrasive and/or corrosive fluids
  • Any engine brand required by the customer Choice of skid or trailer mounted configuration
  • New Eradicator Solids Management System

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We are leaders in Self Priming Centrifugal Wastewater Pump Technology. Hydro Innovations is the exclusive distributor of EDUR pumps for all the municipal and industrial markets in Australia. Edur is the German leader in self-priming centrifugal pump technology, as well as dissolved air floatation (DAF), refrigerant and hot and cold water pumping.

Holding a very large inventory of pumps and spare parts allows us to deliver industry-leading service. With over 88 years combined experience in applying, selecting and troubleshooting pumps, we are also in a good position to help design the best and most cost-effective fluid transfer systems for our customers.

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